" viewWillTransitionToSize："当视图控制器以模态方式呈现时，在iOS 9中不调用 [英] "viewWillTransitionToSize:" not called in iOS 9 when the view controller is presented modally

问题描述

我提供另一个视图控制器：

I present a view controller from another one:

- (void)showModalView
{
   UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
   MySecViewController *mySecViewController = [storyboard instantiateViewControllerWithIdentifier:@"secController"];
   mySecViewController.delegate = self;
   [self presentViewController:mySecViewController animated:YES completion:nil];
}

然后在呈现的 UIViewController ，方法 viewWillTransitionToSize：withTransitionCoordinator：在 iOS 8 中调用，但不在 iOS中调用9 ...

Then in the presented UIViewController, the method viewWillTransitionToSize:withTransitionCoordinator: is called in iOS 8 but not in iOS 9...

谢谢

推荐答案

在当前视图控制器中，如果覆盖 viewWillTransitionToSize：withTransitionCoordinator：，请确保调用 super 。否则，此消息将不会传播到子视图控制器。

In your current view controller, if you override viewWillTransitionToSize:withTransitionCoordinator:, make sure you call super. Otherwise, this message won't get propagated to children view controllers.

Objective-C ：

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

    // Your other code ... 

和 Swift ：

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)

    // Your other code ...
}

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